10kV isolation switch live direct connection device and method for outdoor beam of substation

Abstract

The invention relates to a 10kV isolation switch live direct connection device for an outdoor beam of a substation. The device comprises an operation platform and a direct connection fitting, whereinthe operation platform comprises an insulation ladder with an adjustable angle and an insulation ladder fixing device; an insulation ladder anti-sink fixing device is fixed on a ladder foot of the insulation ladder with the adjustable angle, the insulation ladder with the adjustable angle is an extension ladder, and the direct connection fitting comprises a 10kV isolation switch vertical shunt line clamp for snapping a drainage line. A 10kV isolation switch live direct connection method for an outdoor beam of a substation performs a live vertical direct connection on different current level isolating switches of 10kV outdoor 10kV beam by combining a substation intermediate potential method and a distribution live working gloves method to realize isolation switch shunt. The 10kV isolation switch live direct connection device abandons the traditional live working mode and solves the problem of isolation switch contact heating on the field beam frame of 10kV equipment.

Description

technical field [0001] The invention relates to live work in a power system, in particular to a live direct connection device and method for a 10kV isolating switch on an outdoor beam of a substation. Background technique [0002] When isolating switches of different voltage levels are put into operation in power system substations, with the continuous increase of power supply load, the heating fault of high-voltage isolating switches is on the rise. This is the inevitable result of many factors such as poor contact of connecting parts, product quality problems, poor installation process, improper operation and maintenance, inadequate maintenance, peak or overload operation, etc. If it is not handled in time, it will affect safety and reliability. powered by. The heating treatment of the 66-220kV isolating switch in the existing substation is currently a routine project for live substation work in China. Live workers use insulating ladders to build operating platforms to ma...

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Problems solved by technology

Under the condition that all the above preconditions are met, this emergency live maintenance work can be carried out. Otherwise, even under the same conditions, although the intermediate potential method is superior to the equipotential method and the ground potential method, there is no intervention of the power distribution live work glove method, The range of activities of the operators is not strictly limited, and barrier measures must be taken when necessary, and the minimum combination gaps must be guaranteed. The safety of personal and equipment is not guaranteed, and it is easy to cause phase-to-phase short-circuit or single-phase ground short-circuit accidents. Great harm to the safe and stable operation of the power grid

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